EP 1392790 A4 20080521 - MONOCARBOXYLIC ACID BASED ANTIFREEZE COMPOSITION
Title (en)
MONOCARBOXYLIC ACID BASED ANTIFREEZE COMPOSITION
Title (de)
GEFRIERSCHUTZMITTEL AUF MONOCARBONSÄUREBASIS
Title (fr)
COMPOSITION ANTIGEL A BASE D'ACIDE MONOCARBOXYLIQUE
Publication
Application
Priority
- US 0214559 W 20020508
- US 85136801 A 20010508
Abstract (en)
[origin: US2002030177A1] The present invention relates to a carboxylic acid based antifreeze coolant formulation for heavy duty applications such as for diesel engines which may be used for inhibition and prevention erosion and corrosion of aluminum and the corrosion of other metals exposed to an aqueous liquid in automotive coolant systems. The formulation further inhibits mineral scale. It may be packaged as an ethylene glycol based additive for use in new engines or in a concentrated inhibition package as an additive as for reinhibition of used coolant. The combination of a mixture of ethylene or propylene glycol, a monobasic carboxylic organic acid, azoles, low levels of molybdates, a nitrite salt and/or nitrate salt and/or siloxane stabilized silicate, and combinations thereof, polyvinylpyrrolidone, provide a synergistic protective effect against the cavitation corrosion of aluminum in aqueous liquids reducing the corrosion rate and is effective at relatively low concentrations and varying pH ranges.
IPC 1-7
IPC 8 full level
C09K 5/20 (2006.01); C23F 11/08 (2006.01)
CPC (source: EP US)
C09K 5/20 (2013.01 - EP US); C23F 11/08 (2013.01 - EP US)
Citation (search report)
- [X] WO 0050532 A1 20000831 - ASHLAND INC [US], et al
- See references of WO 02090460A1
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
US 2002030177 A1 20020314; US 6676847 B2 20040113; AU 2002256500 B2 20080508; CA 2435397 A1 20021114; CA 2435397 C 20080916; CN 100526413 C 20090812; CN 1522289 A 20040818; EP 1392790 A1 20040303; EP 1392790 A4 20080521; MX PA03007446 A 20031208; US 2004227124 A1 20041118; US 7407599 B2 20080805; WO 02090460 A1 20021114
DOCDB simple family (application)
US 85136801 A 20010508; AU 2002256500 A 20020508; CA 2435397 A 20020508; CN 02813449 A 20020508; EP 02725970 A 20020508; MX PA03007446 A 20020508; US 0214559 W 20020508; US 75571304 A 20040112